| 摘要 |
<p>A method of effecting fluid movement in porous materials (e.g. metal reinforced concrete or porous geological media) by means of electroosmosis. The method comprises applying a sequence of voltage pulses between spaced apart electrodes (4, 5) having a region of porous material (1) therebetween. Each voltage pulse comprises a first portion in which an electroosmotically active first potential difference is applied between the electrodes (4, 5) to effect fluid movement in the region of porous material (1), and a second portion in which a second potential difference of opposite polarity is applied. In the case of metal reinforced concrete an additional voltage is applied to the metal reinforcement (2) in order to make the voltage of the metal reinforcement (2) negative with respect to the porous material (1) for at least part of the sequence of voltage pulses. The method is used for controlling humidity in metal reinforced concrete, treatment of water, irrigation, oil displacement in oil-/water-bearing strata.</p> |
